Experimental study of air–water countercurrent annular flow under post-flooding conditions
TL;DR: In this article, measurements of the pressure gradient, film thickness and down flow rate were made for a range of air and water flow rates under pre- and post-flooding conditions.
About: This article is published in International Journal of Multiphase Flow.The article was published on 2002-01-01. It has received 14 citations till now. The article focuses on the topics: Water flow & Pressure gradient.
Citations
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TL;DR: In this article, an experimental investigation of gas-liquid counter-current flow in a vertical rectangular channel with 10 mm gap, at rather short distances from liquid entry, is reported.
72 citations
TL;DR: In this article, the authors investigated the liquid film characteristics at the onset of flooding in an inclined pipe (16 mm i.d. and 2.2 m in length) using a constant electric current method and visual observation.
33 citations
TL;DR: In this article, the effects of surface tension on flooding in counter-current two-phase flow in an inclined tube were investigated and an empirical correlation for flooding velocities was proposed that includes functional dependencies on surface tension and tube inclination.
29 citations
TL;DR: In this paper, the complex flow behavior of counter-current gas-liquid flows in concentric vertical annuli over a wide range of gas and liquid flow rates was characterized by applying fast Fourier transform (FFT) on the associated pressure fluctuation signals.
23 citations
TL;DR: In this paper, a model for interfacial wave propagation for a liquid film on the wall of a vertical pipe and for a flowing gas in the central core was derived for a flat interface, and for traveling waves on the interface.
16 citations
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TL;DR: In this article, the effect of tube diameter on the mechanism of flooding in vertical gas-liquid countercurrent annular flow was investigated. But the results indicated that the mechanism was qualitatively different in the small and the large diameter test sections.
56 citations
TL;DR: In this paper, the structure of the wavy interface on a falling liquid film is studied for conditions of countercurrent gas flow in order to investigate mechanisms for flooding, and it is shown that under all conditions, including flooding, the waves propagate only downward and are never of such amplitude as to bridge the tube.
Abstract: The structure of the wavy interface on a falling liquid film is studied for conditions of countercurrent gas flow in order to investigate mechanisms for flooding. Measurements taken just below the liquid feed and at 1.7 m down the tube show that under all conditions, including flooding, the waves propagate only downward and are never of such amplitude as to bridge the tube. These observations are in contrast to speculations in the literature that upward flow of waves or bridging of liquid due to waves cause flooding. In the mechanism suggested, flooding is due to flow reversal in the film just at the liquid entry.
49 citations
01 May 1978
9 citations